If I had to choose one book on the topic, it would be this one.

"Riding the elevator" analogy emphasized through the chapters is simply brilliant - it gives so much understanding even without reading anything at all but walking with this in mind.

Even though first two parts, "Architects" and "Architecture", were my main points to focus on, there is no single page that I wasn't inspired by. "Communication" and "Organizations" parts were in fact much needed and just in time to read for my current project situation. The "Transformation" one is well applicable to any more or less dramatic transformation (supported or even led by architects) happening in large companies, not limited to enterprise mastodons struggling to become "digital natives".

Definitely a career-defining reading for me.